The operation was succesful. The mismatch part was taken out and replaced.
I`m going to to trade or sell these parts. What do you think they are worth? The trigger is a DWM # 64 and not blued. It`s just the lighting and my camera work. One take down lever is an unnumbered and maybe a DDR part. The other one is a commercial # 06. The hold open is an Erfurt # 83. Other parts are unnumbered. The tool is a DWM without markings. And there is one part which I don`t know anything about. Looks like a "auszieher" for some other gun. The front sights are two SA finns and one german.